Last updated: March 17, 2025
July in Portsmouth, United Kingdom, offers a delightful blend of warm temperatures and lively summer ambiance. With maximum temperatures reaching 25°C (78°F) and an average of 18°C (65°F), residents and visitors can enjoy pleasant days perfect for outdoor activities. Although the city experiences 11 days of rain totaling 58 mm (2.3 in), the humidity levels hover around 71%, adding a refreshing feel to the summer air. Whether you're exploring coastal parks or relaxing by the waterfront, July's weather sets the stage for an enjoyable summer getaway in Portsmouth.
In July, Portsmouth basks in the warmth of summer, with temperatures rising noticeably compared to the cooler months. The minimum temperature hovers around 12°C (53°F), while the average temperature reaches a comfortable 18°C (65°F). On sunny days, the maximum can climb to 25°C (78°F), making it an ideal time for outdoor activities and enjoying picturesque coastal views. This month stands out as a high point in the annual temperature trend, following a steady increase from the cooler spring. With pleasant afternoons and mild evenings, July embodies the vibrant spirit of summer in this charming seaside city.
In July, Portsmouth experiences a moderate precipitation level of 58 mm (2.3 in), reflecting a typical summer pattern where occasional rain showers can be expected. This month sees rainfall on 11 days, maintaining consistency with the wetter months that precede it, like June, which recorded 73 mm (2.9 in). As the summer progresses, July's rainfall is less than the upcoming month of August, which often brings an average of 78 mm (3.1 in), hinting at a steady trend of increased precipitation as summer fades into autumn. Overall, while July is not the driest month, its rainfall serves to refresh the green landscapes, preparing for the more substantial deluges typical of the autumn months ahead.
July in Portsmouth marks a noticeable shift in humidity levels, with humidity dropping to 71%, making it one of the driest months of the year. This contrasts sharply with the winter months, where humidity consistently hovers above 90%. As spring transitions into summer, humidity gradually decreases from 85% in April to 80% in June, hinting at a trend towards more comfortable conditions. Interestingly, this dip in July is followed by a slight rise in August, with humidity at 76%, suggesting that while summer brings warmth and outdoor activities, the air can still feel relatively pleasant compared to the moister, chillier months that dominate the rest of the year.
In July, Portsmouth experiences a very high UV Index of 8, maintaining the intensity seen in June. This peaks just before a slight dip in August, where the UV Index drops to 7, signaling that sun protection becomes increasingly vital. With a burn time of only 15 minutes, it’s crucial for residents and visitors to be vigilant about sun exposure during this time. Compared to earlier months, where the exposure categories ranged from low to moderate, July's levels indicate a significant increase in UV radiation, emphasizing the importance of sunscreen and protective clothing. For more details on UV trends in the area, visit Portsmouth UV Index.
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July in Portsmouth shines brightly with an impressive 423 hours of sunlight, marking it as the sunniest month of the year. This peak contrasts sharply with the winter months, where January struggles with just 105 hours. As spring transitions into summer, there's a clear upward trend in sunshine, starting from 222 hours in March and steadily climbing through 410 hours in May to reach July's glorious heights. Even as August rolls in, daylight remains generous with 386 hours, although it indicates a slight retreat from July's zenith. This seasonal pattern illustrates Portsmouth's delightful summer charm, inviting both locals and visitors to bask in the warmth and beauty of longer, sunlit days.
In Portsmouth, July brings a promising 42% chance of sunny weather, making it one of the brighter months of the year. This is a noticeable increase from the earlier months, where January and February linger around the low 20s in terms of sunshine probability. As spring unfolds, the likelihood of sunny days rises sharply; April enjoys a peak of 58%, followed by a dip in May that highlights the unpredictable nature of late spring weather. Yet, July stands out with a solid chance for sunny skies, paving the way for summer adventures. While August sees a slight decline to 33%, July remains a key month for those seeking to soak up the sun in this coastal city.
In July, Portsmouth enjoys the delightful embrace of 15 hours of daylight, marking a peak in the summer months. This trend of increasing daylight begins in January with a modest 8 hours and surges steadily, reaching its zenith in June at 16 hours. As summer progresses, the daylight begins to wane slightly into August with 14 hours, but the warmth of July remains a highlight. The gradual decline continues into autumn, reminding us that while the days grow shorter, the vibrancy of summer lingered just a little longer. Overall, July represents a splendid midpoint in the annual rhythm of daylight, blending the highest sunny moments with a promise of the changing seasons ahead.
In July, Portsmouth experiences a gentle breeze with an average wind speed of 4.6 m/s (10 mph), marking a slight uptick from the calmest month of June. This warm summer month continues the trend of mild winds found in early summer, contributing to the city's pleasant maritime atmosphere. As the wind speed gradually increases again in August, reaching 5.3 m/s (12 mph), it becomes evident that Portsmouth’s coastal climate often turns more invigorating as the season progresses. This seasonal fluctuation not only enhances the summer experience but also invites sailors and wind enthusiasts to take advantage of the increasingly favorable conditions.
The weather in Portsmouth changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Portsmouth and find detailed weather information for every month.
The weather in July is generally warmer and more favorable compared to January. With average temperatures reaching 18°C (65°F) and a maximum of 25°C (78°F), July provides a pleasant experience despite its humidity level of 71%. In contrast, January is significantly cooler, with average temperatures around 7°C (44°F) and a maximum of just 13°C (56°F). While both months see precipitation on 11 days, January has slightly higher rainfall at 68 mm (2.7 in), coupled with a higher humidity level of 91%. For more detailed insights on January weather, check out Portsmouth weather in January.
In comparing the weather between July and February, it’s clear that these months exhibit contrasting climates. July boasts milder temperatures, with a minimum of 12°C (53°F) and a maximum of 25°C (78°F), and an average of 18°C (65°F). Typically, this month receives about 58 mm (2.3 in) of precipitation over 11 days, with a humidity level of 71%. In stark contrast, February experiences colder temperatures, with a minimum of -3°C (28°F) and a maximum of 13°C (55°F), averaging only 7°C (45°F). Additionally, it sees slightly more rainfall at 75 mm (3.0 in) over 12 days, coupled with higher humidity at 89%. This significant difference in temperature and precipitation highlights the varied weather patterns throughout the year. For more insights into February's climate, you can visit Portsmouth weather in February.
In comparing the weather in July and March, a notable difference in temperature can be observed. July boasts a milder climate, with minimum temperatures of 12°C (53°F) and an average of 18°C (65°F), peaking at 25°C (78°F). In contrast, March experiences colder conditions, with minimum temperatures dropping to -3°C (28°F) and an average of only 8°C (47°F), reaching a maximum of 14°C (58°F). Additionally, July sees less precipitation, at 58 mm (2.3 in) over 11 days, compared to March's 70 mm (2.7 in) spread over 13 days. Humidity levels are also higher in March, sitting at 86%, while July has a relatively lower humidity of 71%. For more detailed insights, check out Portsmouth weather in March.
In comparing the weather of July and April, it is clear that July experiences significantly warmer temperatures, with a minimum of 12°C (53°F), an average of 18°C (65°F), and a maximum of 25°C (78°F). In contrast, April's temperatures are much cooler, ranging from a minimum of 1°C (34°F) to a maximum of 19°C (66°F), with an average of 10°C (50°F). Additionally, July sees higher precipitation levels at 58 mm (2.3 in) over 11 days, while April has less precipitation at 32 mm (1.3 in) over 7 days. Lastly, humidity is higher in April at 85%, compared to July's 71%. For a more detailed comparison, you can check Portsmouth weather in April.
In comparing the weather between July and May, July features warmer temperatures, with a minimum of 12°C (53°F) and an average of 18°C (65°F), while May experiences cooler conditions, starting at a minimum of 5°C (41°F) and averaging 13°C (55°F). Both months see a similar amount of precipitation, with July receiving 58 mm (2.3 in) compared to May's 56 mm (2.2 in), and both months have rainfall on 11 days. However, July tends to be slightly less humid at 71%, while May has a higher humidity level of 79%. For more detailed insights on May weather in Portsmouth, you can check Portsmouth weather in May.
In comparing the weather of July and June, July features slightly warmer average temperatures, ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), while June has a minimum of 9°C (49°F) and the same maximum of 25°C (76°F). Both months see 25°C as their peak temperature, but July is generally more comfortable with an average of 18°C (65°F) compared to June's 16°C (61°F). However, June experiences higher precipitation levels with 73 mm (2.9 in) over 9 days, compared to July's 58 mm (2.3 in) spread over 11 days. Additionally, humidity is higher in June at 80%, while July maintains a relatively lower level of 71%. For more detailed weather insights, you can visit Portsmouth weather in June.
In comparing the weather between July and August, both months exhibit mild temperatures, but with slight variations. July has an average temperature of 18°C (65°F), with a maximum of 25°C (78°F) and a minimum of 12°C (53°F). In contrast, August sees a very similar average of 18°C (64°F) but can reach up to 26°C (80°F) and has a slightly lower minimum temperature of 11°C (52°F). Precipitation levels increase in August to 78 mm (3.1 in) over 12 days, compared to July's 58 mm (2.3 in) over 11 days, and humidity is higher in August at 76% compared to July's 71%. This suggests that while both months offer pleasant summer weather, August tends to be a bit wetter and more humid. For more details, you can check Portsmouth weather in August.
In comparing the weather between July and September, July presents a warmer climate with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), while September experiences cooler temperatures, averaging between 8°C (47°F) and 24°C (76°F). Both months have similar precipitation levels, with July receiving 58 mm (2.3 in) over 11 days and September slightly lower at 57 mm (2.2 in) across 10 days. Notably, September also has a higher humidity level at 82%, compared to July's 71%, contributing to a more damp and cool atmosphere. For more detailed insights, you can explore Portsmouth weather in September.
In July, the weather is generally warmer with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), averaging around 18°C (65°F). The month sees moderate precipitation, totaling 58 mm (2.3 in) over about 11 days, with humidity levels around 71%. In contrast, October brings cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 20°C (68°F), averaging just 13°C (56°F). Additionally, October experiences more rain, accumulating 117 mm (4.6 in) across 16 days, and a higher humidity level of 90%. For more detailed insights into the October climate, check out Portsmouth weather in October.
In comparing the weather of July and November, we see a notable shift in temperature and conditions. July boasts a range of temperatures from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), with an average around 18°C (65°F). The month experiences relatively moderate precipitation at 58 mm (2.3 in), spread over about 11 days, accompanied by a humidity level of 71%. In contrast, November brings cooler temperatures, ranging from a chilly minimum of 1°C (33°F) to a maximum of 16°C (61°F), with an average of just 10°C (50°F). This month also sees an increase in precipitation, totaling 87 mm (3.4 in) over 15 days, and a higher humidity level of 92%. For more detailed insights, you can refer to Portsmouth weather in November.
In comparing the weather between July and December, notable differences emerge in temperature and precipitation. July experiences a milder range with minimum temperatures around 12°C (53°F) and maximums reaching 25°C (78°F), creating an average of 18°C (65°F). Humidity sits at 71%, and the month sees about 58 mm (2.3 in) of rain over approximately 11 days. In contrast, December brings cooler conditions, with a minimum of 0°C (33°F) and a maximum of just 14°C (57°F), resulting in an average temperature of 8°C (47°F). Precipitation also increases, totaling 118 mm (4.7 in) over about 16 days, along with higher humidity at 92%. For more detailed insights on the colder season, check out Portsmouth weather in December.
As July arrives in Portsmouth, the weather takes a notable turn towards warmth and vibrancy, making it a standout month in the annual climate cycle. With maximum temperatures often peaking at a pleasant 25°C, residents and visitors alike can enjoy the long, sun-filled days. While the average temperature hovers around 18°C, it’s warmer and sunnier compared to the chillier and damp months preceding it, inviting outdoor activities and exploration. However, don't forget the possibility of summer showers, as July experiences around 11 days of precipitation, contributing to a humidity level of approximately 71%. This blend of warmth and occasional rain sets July apart, making it a unique and enjoyable month. For a more detailed understanding of the local climate, visit Portsmouth Climate.